Comparison
langtrace vs trulens
Verdict
Pick langtrace if langtrace stands out as an open-source observability solution for large language models, offering real-time tracing and evaluation capabilities through the Open Telemetry framework; pick trulens if trulens aids in evaluating and monitoring Language Model experiments and AI agents, with integrations for various providers.
Markdown twin · langtrace alternatives · trulens alternatives
GraphCanon updated today
vs
Trust & integrity
| Signal | langtrace | trulens |
|---|---|---|
| Maintenance | Slowing (276d since push) As of today · github_public_v1 | Very active (0d since push) As of 1d · github_public_v1 |
| Provenance | Not a fork · Organization account As of today · github_public_v1 | Not a fork · Organization account As of 1d · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | No published findings from this source as of 2026-07-11 As of 1mo · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- langtrace
- Open Telemetry based observability tool for LLM applications
- trulens
- Evaluation and Tracking for LLM Experiments and AI Agents
Stars
- langtrace
- 1.2k
- trulens
- 3.5k
Forks
- langtrace
- 126
- trulens
- 327
Open issues
- langtrace
- 1
- trulens
- 65
Language
- langtrace
- TypeScript
- trulens
- Python
Adopt for
- langtrace
- Langtrace stands out as an open-source observability solution for large language models, offering real-time tracing and evaluation capabilities through the Open Telemetry framework.
- trulens
- Trulens aids in evaluating and monitoring Language Model experiments and AI agents, with integrations for various providers.
Persona
- langtrace
- -
- trulens
- -
Runtime
- langtrace
- -
- trulens
- -
License
- langtrace
- AGPL-3.0
- trulens
- MIT
Last pushed
- langtrace
- Nov 17, 2025
- trulens
- Aug 20, 2026
Categories
- langtrace
- Evaluation & Observability
- trulens
- AI Agents, Evaluation & Observability
Trust and health
Maintenance
- langtrace
- Slowing (36%)
- trulens
- Very active (96%)
Days since push
- langtrace
- 276d
- trulens
- 0d
Open issues (now)
- langtrace
- 1
- trulens
- 65
Stars delta
- langtrace
- +12 (30d)
- trulens
- +68 (30d)
Open issues delta
- langtrace
- 0 (30d)
- trulens
- -32 (30d)
OSV dependency advisories
- langtrace
- No lockfile (source not queried)
- trulens
- No published findings from this source as of 2026-07-11
Full report
- langtrace
- Trust report
- trulens
- Trust report
Typed relationship
langtrace alternative trulensBoth LANGTRACE and TruLens provide open-source observability solutions for LLMs, helping with monitoring and evaluation during development phases.
Choose langtrace if…
- langtrace is primarily TypeScript; trulens is Python.
- License: langtrace is AGPL-3.0, trulens is MIT.
- Both LANGTRACE and TruLens provide open-source observability solutions for LLMs, helping with monitoring and evaluation during development phases.
- Tags unique to langtrace: ai, datasets, evaluations, gpt.
- langtrace ships Docker support for self-hosted deployment.
- When developing or using LLMs and frameworks where end-to-end visibility into every aspect of model performance is crucial.
When NOT to use langtrace
- For teams that do not require real-time tracing and evaluations, as implementing Langtrace might introduce unnecessary overhead.
- When working with non-LLM AI applications or other machine learning models, Langtrace’s specialized features for large language models may not provide much value.
Choose trulens if…
- trulens is primarily Python; langtrace is TypeScript.
- License: trulens is MIT, langtrace is AGPL-3.0.
- Both LANGTRACE and TruLens provide open-source observability solutions for LLMs, helping with monitoring and evaluation during development phases.
- Tags unique to trulens: agent-evaluation, ai-agents, ai-monitoring, evaluation-tool.
- Also covers AI Agents.
- Need to evaluate specific models from OpenAI, Google Gemini, AWS Bedrock, or HuggingFace.
When NOT to use trulens
- Looking for a tool that solely focuses on training models rather than evaluation and monitoring.
- Require support for less common model providers not listed in Trulens integrations.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (Scale3-Labs/langtrace) · observed Aug 21, 2026
- GitHub forks (Scale3-Labs/langtrace) · observed Aug 21, 2026
- Last push (Scale3-Labs/langtrace) · observed Nov 17, 2025
- License file (AGPL-3.0) · observed Aug 21, 2026
- Decision facts (enrichment) · observed Jul 12, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (truera/trulens) · observed Aug 20, 2026
- GitHub forks (truera/trulens) · observed Aug 20, 2026
- Last push (truera/trulens) · observed Aug 20, 2026
- License file (MIT) · observed Aug 20, 2026
- Decision facts (enrichment) · observed Jul 12, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: langtrace 1.2k · trulens 3.5k (synced Aug 21, 2026).
Common questions
- What is the difference between langtrace and trulens?
- langtrace: Open Telemetry based observability tool for LLM applications. trulens: Evaluation and Tracking for LLM Experiments and AI Agents. See the comparison table for live GitHub stats and shared categories.
- When should I choose langtrace over trulens?
- Choose langtrace over trulens when langtrace is primarily TypeScript; trulens is Python; License: langtrace is AGPL-3.0, trulens is MIT; Both LANGTRACE and TruLens provide open-source observability solutions for LLMs, helping with monitoring and evaluation during development phases; Tags unique to langtrace: ai, datasets, evaluations, gpt; langtrace ships Docker support for self-hosted deployment; When developing or using LLMs and frameworks where end-to-end visibility into every aspect of model performance is crucial.
- When should I choose trulens over langtrace?
- Choose trulens over langtrace when trulens is primarily Python; langtrace is TypeScript; License: trulens is MIT, langtrace is AGPL-3.0; Both LANGTRACE and TruLens provide open-source observability solutions for LLMs, helping with monitoring and evaluation during development phases; Tags unique to trulens: agent-evaluation, ai-agents, ai-monitoring, evaluation-tool; Also covers AI Agents; Need to evaluate specific models from OpenAI, Google Gemini, AWS Bedrock, or HuggingFace.
- When should I avoid langtrace?
- For teams that do not require real-time tracing and evaluations, as implementing Langtrace might introduce unnecessary overhead. When working with non-LLM AI applications or other machine learning models, Langtrace’s specialized features for large language models may not provide much value.
- When should I avoid trulens?
- Looking for a tool that solely focuses on training models rather than evaluation and monitoring. Require support for less common model providers not listed in Trulens integrations.
- Is langtrace or trulens more popular on GitHub?
- trulens has more GitHub stars (3,516 vs 1,228). Stars measure visibility, not whether either tool fits your constraints.
- Are langtrace and trulens open source?
- Yes - both are open-source projects on GitHub (langtrace: AGPL-3.0, trulens: MIT).
- Where can I find alternatives to langtrace or trulens?
- GraphCanon lists graph-backed alternatives at langtrace alternatives and trulens alternatives (langtrace markdown twin, trulens markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, langtrace or trulens?
- langtrace: Slowing. trulens: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for langtrace and trulens?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: langtrace trust report; trulens trust report.